Compressor and heating, ventilation and air conditioning device

Abstract

A compressor and a heating, ventilation and air conditioning device. One end of a main shaft (3) of a compressor (100) is transmittingly connected to a magnetic bearing, and the other end of the main shaft (3) is connected to an impeller (2) and can drive the impeller (2) to rotate; a sealing apparatus (1) comprises a main body portion (11) and a plurality of sealing teeth (12); the main shaft (3) rotatably passes through the main body portion (11); the main body portion (11) is arranged opposite to the impeller (2) in a first direction; the plurality of sealing teeth (12) are provided on the end surface of the main body portion (11) facing the impeller (2); the outer surface of at least one sealing tooth (12) is provided with an abradable layer (13); the abradable layer (13) is configured to be abraded when colliding with the impeller (2); and the first direction is consistent with the axial direction of the main shaft (3). The compressor can reduce the probability of instability when an impeller collides with a sealing apparatus, thereby reducing a clearance between the sealing apparatus and the impeller.

Description

Compressor and heating and ventilation equipment

[0001] Cross-reference to related applications

[0002] This application claims priority to and the benefit of the following patent applications, the entire contents of which are incorporated herein by reference:

[0003] Chinese Patent Application No. 202421535711.4, filed on June 28, 2024, entitled “Compressor and Heating and Ventilation Equipment” with the China National Intellectual Property Office. TECHNICAL FIELD

[0004] The present application relates to the technical field of heating and ventilation equipment, and in particular to a compressor and heating and ventilation equipment. BACKGROUND

[0005] Magnetic suspension bearings have been gradually applied to the fields of turbomachinery, vacuum cleaning, flywheel energy storage, etc. due to their high speed, oil-free, energy-saving, low noise, etc.

[0006] In the prior art, the magnetic suspension bearing of the compressor is in transmission connection with the main shaft, and the impeller on the main shaft is sealed by a sealing structure. When the compressor is working, the main shaft is in a suspended state, and the sealing structure will collide with the impeller after wear, which will cause the main shaft in a suspended state to be unstable, thereby causing the magnetic suspension rotor to be unstable. In order to reduce the probability of collision and wear between the sealing structure and the impeller, the gap between the sealing structure and the impeller is increased in the prior art to reduce the probability of collision and wear between the sealing and the impeller.

[0007] However, increasing the gap between the sealing structure and the impeller will increase the leakage between the sealing structure and the impeller, thereby causing poor energy efficiency of the compressor. SUMMARY

[0008] The purpose of the present application is to at least solve the problem of large gap between the sealing structure and the impeller in the prior art, thereby causing large leakage and poor energy efficiency of the compressor. The purpose is achieved in the following way:

[0009] A first aspect of the present application provides a compressor comprising an impeller, a magnetic suspension bearing, a main shaft and a sealing device. One end of the main shaft is in transmission connection with the magnetic suspension bearing, and the other end of the main shaft is connected with the impeller and can drive the impeller to rotate; the sealing device comprises a main body and a plurality of sealing teeth, the main shaft is rotatably arranged in the main body, the main body is arranged opposite to the impeller along a first direction, a plurality of sealing teeth are arranged on the end face of the main body facing the impeller, and the outer surface of at least one sealing tooth is provided with an abradable layer, which is configured to be abraded when colliding with the impeller, wherein the first direction is consistent with the axial direction of the main shaft.

[0010] According to the compressor of the present application, by arranging the abradable layer on at least one sealing tooth to reduce the probability of instability of the impeller after contacting with the abradable layer, the gap between the sealing device and the impeller can be reduced to reduce the leakage between the impeller and the sealing device, so that the energy efficiency of the compressor of the present application can be improved. Moreover, by arranging the abradable layer, the impeller can continue to rotate after colliding with the abradable layer, so that the compressor of the present application has high reliability.

[0011] In addition, according to the compressor of the present application, the following additional technical features can also be provided:

[0012] In some embodiments of the present application, the outer surface of each sealing tooth is provided with the abradable layer; and / or, at least part of the end surface of the main body portion towards the impeller is provided with the abradable layer.

[0013] In some embodiments of the present application, the area of the abradable layer is less than or equal to the area of the outer surface of the sealing tooth.

[0014] In some embodiments of the present application, the thermal conductivity of the abradable layer is 0.03 W / mk to 0.5 W / mk.

[0015] In some embodiments of the present application, the sealing tooth is in a ring structure, and a plurality of the sealing teeth are at least three, the plurality of the sealing teeth are arranged in a second direction and spaced from each other, and the second direction is perpendicular to the first direction, wherein the distance between at least one group of adjacent sealing teeth is equal to the distance between any other group of sealing teeth, or the distance between at least one group of adjacent sealing teeth is greater than or less than the distance between at least another group of adjacent sealing teeth.

[0016] In some embodiments of the present application, the abradable layer is crimped on the sealing tooth; or, the abradable layer is adhered to the sealing tooth; or, the abradable layer is arranged on the sealing tooth by spraying or coating.

[0017] In some embodiments of the present application, the abradable layer is a polytetrafluoroethylene layer.

[0018] In some embodiments of the present application, the thickness of the abradable layer is in the range of 0.1 mm-0.5 mm.

[0019] In some embodiments of the present application, the sealing tooth has a first end portion and a second end portion arranged oppositely in the first direction, the second end portion is connected to the main body portion, and the gap between the abradable layer of the first end portion and the impeller is in the range of 0.05 mm-0.4 mm.

[0020] The second aspect of the present application provides a heating and ventilation device comprising the compressor of the first aspect as described above.

[0021] According to the heating and ventilation device provided by the embodiment of the present application, the compressor is as described above, the probability of instability of the impeller after contacting with the abradable layer is reduced by arranging the abradable layer on the at least one sealing tooth, so that the gap between the sealing device and the impeller is reduced, the leakage of the shaft end of the main shaft is reduced, the energy efficiency of the compressor of the present application is higher, and the energy efficiency of the heating and ventilation device of the present application is higher. Moreover, by arranging the abradable layer, the impeller can continue to rotate after contacting with the abradable layer, so that the compressor of the embodiment of the present application has higher reliability, and the energy efficiency of the heating and ventilation device of the present application is higher. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments, and are not intended to limit the scope of the present application. Moreover, like reference numerals designate similar parts throughout the several views, in which:

[0023] Fig. 1 is a structural schematic diagram of a compressor according to an embodiment of the present application;

[0024] Fig. 2 is an enlarged view of A in Fig. 1;

[0025] Fig. 3 is an enlarged view of B in Fig. 1, in which the impeller is in contact with the abradable layer;

[0026] Fig. 4 is a partial structural enlarged view of the seal in B in Fig. 1, in which the abradable layer is in a worn state;

[0027] Fig. 5 is a partial structural schematic diagram of Fig. 1;

[0028] Fig. 6 is an enlarged view of C in Fig. 5;

[0029] Fig. 7 is a schematic diagram of a sealing device according to an embodiment of the present application;

[0030] Fig. 8 is a schematic diagram of a sealing device according to another embodiment of the present application;

[0031] Fig. 9 is an enlarged view of D in Fig. 7;

[0032] Fig. 10 is an enlarged view of E in Fig. 8;

[0033] Fig. 11 is a schematic diagram of the sealing device in Fig. 5 from another perspective.

[0034] In the drawings: 100, compressor; 1, seal device; 11, main body portion; 112, end surface of main body portion facing toward impeller; 12, seal teeth; 121, first end portion; 122, second end portion; 13, abradable layer; 2, impeller; 3, main shaft; a indicates first direction; b indicates second direction. DETAILED DESCRIPTION

[0035] Example embodiments of the present application will be described herein below with reference to the accompanying drawings. While example embodiments of the present application are illustrated, it is to be understood that the present application can be carried out in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0036] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0037] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to differentiate one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0038] For the purposes of the description, relative terms of orientation such as "inner", "outer", "inwardly", "outwardly", "lower", "bottom", "top", "upper", and the like, can be used to describe one element or feature's relationship to another element or feature as illustrated in the figures. These relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The embodiments are not limited in this context.

[0039] In the present application, unless specifically defined otherwise, the terms "mount", "connect", "connection", "fixed", and the like, are to be construed broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, four, etc., unless otherwise specifically defined.

[0041] In the prior art compressor, the main shaft is in a suspended state when the compressor is working because the main shaft is drivingly connected with the magnetic suspension bearing. When the impeller deflects in rotation, the impeller collides with the sealing structure, and the sealing structure hinders the rotation of the impeller when the sealing structure contacts the impeller, resulting in instability of the impeller and the main shaft. In order to reduce the probability of mutual collision between the impeller and the sealing structure, the prior art usually increases the gap between the sealing structure and the impeller to reduce the probability of collision between the sealing structure and the impeller. However, the increase of the gap between the sealing structure and the impeller will increase the leakage between the sealing structure and the impeller, thereby resulting in poor energy efficiency of the compressor.

[0042] In order to solve the problem of large gap between the sealing structure and the impeller in the prior art, thereby resulting in large leakage and poor energy efficiency of the compressor, the embodiments of the present application propose a compressor 100, which can reduce the probability of instability of the impeller 2 after colliding with the sealing device 1, thereby reducing the gap between the sealing device 1 and the impeller 2, and further reducing the leakage between the sealing device 1 and the impeller 2, and improving the energy efficiency of the compressor.

[0043] The embodiment of the present application also provides a compressor 100 comprising the compressor 100 according to the above embodiment, which can reduce the shaft end leakage of the main shaft 3 and has high energy efficiency.

[0044] The compressor 100 and the compressor according to the embodiments of the present application are described below in combination with FIGS. 1-11.

[0045] In combination with FIGS. 1-11, the compressor 100 according to the embodiments of the present application comprises the impeller 2, the magnetic bearing (not shown in the figure), the main shaft 3 and the sealing device 1. One end of the main shaft 3 is drivingly connected with the magnetic bearing, and the other end of the main shaft 3 is connected with the impeller 2 and can drive the impeller 2 to rotate; the sealing device 1 comprises a main body 11 and a plurality of sealing teeth 12, the main shaft 3 is rotatably arranged in the main body 11, the main body 11 is oppositely arranged with the impeller 2 in a first direction, and the plurality of sealing teeth 12 are arranged on an end surface 112 of the main body 11 facing the impeller 2, and an outer surface of at least one sealing tooth 12 is provided with an abradable layer 13 which is configured to be abraded when colliding with the impeller 2. The first direction is consistent with the axial direction of the main shaft 3.

[0046] The first direction is indicated by the arrow in FIGS. 1, 2, 5 and 6, and as some examples, the first direction is the axial direction of the main shaft 3.

[0047] The main body 11 is oppositely arranged with the impeller 2 in the first direction, and each sealing tooth 12 is located between the main body 11 and the impeller 2 in the first direction, and the adjacent sealing teeth 12 form a flow blocking gap and an expansion cavity to generate a throttling effect when the impeller 2 rotates, thereby reducing the leakage between the impeller 2 and the main body 11.

[0048] When the compressor 100 is working, the main shaft 3 is in a suspended state under the action of the magnetic bearing, the main shaft 3 drives the impeller 2 to rotate to compress air or refrigerant under the action of the magnetic bearing. The abradable layer 13 is arranged on the sealing tooth 12 which has a risk of collision with the impeller 2, so that the impeller 2 can contact the abradable layer 13 when the impeller 2 is deflected. The sealing tooth 12 provided with the abradable layer 13 can be one or more, and the abradable layer 13 can be arranged on part of the plurality of sealing teeth 12 or each sealing tooth 12. For those skilled in the art, the number of sealing teeth 12 provided with the abradable layer 13 can be determined according to the actual situation, and whether the sealing tooth 12 has a risk of collision with the impeller 2 can also be determined according to the actual situation.

[0049] In combination with FIGS. 3 and 4, when the impeller 2 is deflected in rotation, the impeller 2 collides with the abradable layer 13 of the sealing tooth 12. The portion of the abradable layer 13 that is in contact with the impeller 2 is abraded and separated from the abradable layer 13 under the impact of the impeller 2, so as to avoid impeding the rotation of the impeller 2, thereby avoiding excessive resistance of the impeller 2, and further reducing the probability of instability of the impeller 2 and the main shaft 3. Moreover, since the portion of the abradable layer 13 that is in contact with the impeller 2 is abraded and separated from the abradable layer 13 under the impact of the impeller 2, the impeller 2 can continue to rotate after colliding with the abradable layer 13, thereby improving the reliability of the compressor 100 of the embodiment.

[0050] As some examples, the abraded portion of the abradable layer 13 under the impact of the impeller 2 is shown at c in FIG. 4. After the abraded portion at c, the abradable layer 13 is in a smooth state.

[0051] Since the probability of instability of the impeller 2 and the main shaft 3 can be reduced after the impeller 2 collides with the abradable layer 13, the gap between the impeller 2 and the sealing device 1 can be reduced, thereby reducing the leakage between the impeller 2 and the sealing device 1, and further improving the energy efficiency of the compressor having the embodiment.

[0052] The compressor 100 of the embodiment can reduce the gap between the sealing device 1 and the impeller 2, thereby reducing the leakage between the impeller 2 and the sealing device 1, and further improving the energy efficiency of the compressor having the embodiment, by arranging the abradable layer 13 on at least one sealing tooth 12 to reduce the probability of instability of the impeller 2 after the impeller 2 collides with the abradable layer 13. Moreover, the impeller 2 can continue to rotate after colliding with the abradable layer 13 by arranging the abradable layer 13, thereby improving the reliability of the compressor 100 of the embodiment.

[0053] During the assembly of the compressor 100 of the embodiment, the abradable layer 13 can be used as a positioning mark. Since the gap between the abradable layer 13 on the end of the sealing tooth 12 close to the impeller 2 and the impeller 2 is small, the positioning difficulty of the impeller 2 can be reduced.

[0054] The main body part 11 of the sealing device 1 is arranged on the end cover of the magnetic suspension bearing. A portion of the main shaft 3 is located in the magnetic suspension bearing and is in driving connection with the magnetic suspension bearing. Another portion of the main shaft 3 is located outside the magnetic suspension bearing and passes through the end cover and the main body part 11 of the magnetic suspension bearing.

[0055] The main body part 11 is arranged on the end cover of the magnetic suspension bearing to be installed and fixed, thereby making the structure of the compressor 100 of the embodiment reasonable.

[0056] In combination with FIGS. 7, 8, 9 and 10, in some embodiments of the present application, the outer surface of each sealing tooth 12 is provided with an abradable layer 13.

[0057] Providing the outer surface of each sealing tooth 12 with an abradable layer 13 can further enable the impeller 2 to contact the abradable layer 13 when the impeller 2 is deflected, thereby further reducing the probability of the impeller 2 losing stability after contacting the abradable layer 13, and further improving the reliability of the compressor 100 of the embodiments of the present application.

[0058] In combination with FIGS. 7 and 9, in some embodiments of the present application, at least part of the end surface 112 of the main body portion toward the impeller is provided with an abradable layer 13.

[0059] The at least part of the outer surface can be part of the outer surface, or the entire outer surface.

[0060] Providing at least part of the end surface 112 of the main body portion toward the impeller with an abradable layer 13 can further enable the impeller 2 to contact the abradable layer 13 when the impeller 2 is deflected, thereby further reducing the probability of the impeller 2 losing stability after contacting the abradable layer 13, and further improving the reliability of the compressor 100 of the embodiments of the present application.

[0061] In addition, in the production process, the end surface 112 of the main body portion toward the impeller and the sealing tooth 12 are integrally sprayed, which can reduce the process difficulty and improve the production efficiency.

[0062] In some embodiments of the present application, the area of the abradable layer 13 is less than or equal to the area of the outer surface of the sealing tooth 12. That is, the abradable layer 13 is provided on the entire outer surface of each sealing tooth 12, or the abradable layer 13 is provided on part of the outer surface of at least one sealing tooth 12.

[0063] By making the area of the abradable layer 13 less than or equal to the area of the outer surface of the sealing tooth 12, the sealing device 1 of the embodiments of the present application can adapt to various use requirements and production requirements.

[0064] In some embodiments of the present application, the abradable layer 13 is a soft material resistant to high temperature.

[0065] The part of the abradable layer 13 in contact with the impeller 2 generates a large amount of heat under the impact of the impeller 2, so the abradable layer 13 has a high melting point to avoid high-temperature melting of the abradable layer 13.

[0066] Making the abradable layer 13 have a low hardness can make the part of the abradable layer 13 in contact with the impeller 2 more easily separated from the abradable layer 13 under the impact of the impeller 2, thereby reducing the influence of the abradable layer 13 on the movement of the impeller 2 when worn, and further improving the reliability of the compressor 100 of the embodiments of the present application.

[0067] In the prior art, the gap between the impeller and the sealing structure increases with the temperature rise of the coils of the magnetic bearing.

[0068] To this end, in some embodiments of the present application, the thermal conductivity of the abradable layer 13 is 0.03 W / mk to 0.5 W / mk. That is, the abradable layer 13 has good thermal insulation performance, so that the abradable layer 13 can play a role in thermal insulation, avoiding the temperature rise of the coils of the magnetic bearing connected in transmission with the main shaft 3 being too large, thereby avoiding the temperature rise of the coils of the magnetic bearing being too large to cause the gap between the impeller 2 and the sealing device 1.

[0069] In some embodiments of the present application, the abradable layer 13 is a polytetrafluoroethylene layer.

[0070] The melting point of polytetrafluoroethylene is high, which can avoid the heat generated when the impeller 2 collides with the polytetrafluoroethylene layer from melting the polytetrafluoroethylene layer.

[0071] The hardness of polytetrafluoroethylene is low, which can make the part of the polytetrafluoroethylene layer in contact with the impeller 2 more easily separated from the polytetrafluoroethylene layer under the collision of the impeller 2.

[0072] The thermal conductivity of polytetrafluoroethylene is low, which can play a role in thermal insulation, avoiding the temperature rise of the coils of the magnetic bearing connected in transmission with the main shaft 3 being too large.

[0073] In combination with FIGS. 1, 2, 5 and 6, in some embodiments of the present application, the sealing teeth 12 are annular structures, the plurality of sealing teeth 12 is at least three, the plurality of sealing teeth 12 is arranged in a second direction and spaced apart, the second direction is perpendicular to the first direction, the distance between at least one group of adjacent sealing teeth 12 is equal to the distance between any other group of sealing teeth 12. Alternatively, the distance between at least one group of adjacent sealing teeth 12 is greater than or less than the distance between at least another group of adjacent sealing teeth 12.

[0074] It should be noted that a group of adjacent sealing teeth 12 and another group of adjacent sealing teeth 12 can include the same sealing teeth 12. For example, the sealing teeth 12a, the sealing teeth 12b and the sealing teeth 12c are arranged in the second direction in turn, the sealing teeth 12b is located between the sealing teeth 12a and the sealing teeth 12c, a group of sealing teeth 12 can be the sealing teeth 12a and the sealing teeth 12b, and another group of sealing teeth 12 can be the sealing teeth 12b and the sealing teeth 12c.

[0075] The second direction is indicated by the arrow at b in FIGS. 1, 2, 5 and 6, as some examples, the second direction is the radial direction of the main shaft 3.

[0076] The distance between the sealing teeth 12 is set so that the sealing device 1 can adapt to various sealing conditions.

[0077] In some embodiments of the present application, the abrasive layer 13 is crimped on the sealing tooth 12, so that the abrasive layer 13 can be more stably arranged on the sealing tooth 12. By crimping the abrasive layer 13 and the sealing tooth 12, the sealing device 1 of the present embodiment has a fast production speed, a simple production process, and a high production efficiency.

[0078] In some embodiments of the present application, the abrasive layer 13 is bonded to the sealing tooth 12, so that the abrasive layer 13 can be more stably arranged on the sealing tooth 12. By bonding the abrasive layer 13 and the sealing tooth 12, the sealing device 1 of the present embodiment has a fast production speed, a simple process, and a low cost.

[0079] In some embodiments of the present application, the abrasive layer 13 is sprayed or coated on the sealing tooth 12, so that the abrasive layer 13 can be more stably arranged on the sealing tooth 12. By spraying or coating the abrasive layer 13 and the sealing tooth 12, the abrasive layer 13 has good adhesion, and the sealing device 1 of the present embodiment has a low process difficulty in production.

[0080] In some embodiments of the present application, the thickness of the abrasive layer 13 is in the range of 0.1mm-0.5mm, for example: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm.

[0081] When the thickness of the abrasive layer 13 is less than 0.1mm, the abrasive layer 13 is too thin, and the impeller 2 has a risk of grinding through the abrasive layer 13 and directly contacting the sealing tooth 12.

[0082] When the thickness of the abrasive layer 13 is greater than 0.5mm, the abrasive layer 13 is too thick, resulting in material waste.

[0083] When the thickness of the abrasive layer 13 is 0.1mm-0.5mm, the thickness of the abrasive layer 13 is in a reasonable state, which can avoid the impeller 2 grinding through the abrasive layer 13 and directly contacting the sealing tooth 12, and can avoid material waste.

[0084] In combination with FIGS. 2 and 6, in some embodiments of the present application, the sealing tooth 12 has a first end portion 121 and a second end portion 122 arranged oppositely in the first direction, and the second end portion 122 is connected to the main body portion 11. The gap between the abrasive layer 13 of the first end portion 121 and the impeller 2 is in the range of 0.05mm-0.4mm, for example: 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm.

[0085] As some examples, the gap between the abrasive layer 13 of the first end portion 121 and the impeller 2 is shown at d in FIG. 2.

[0086] When the gap between the abradable layer 13 of the first end portion 121 and the impeller 2 is less than 0.05 mm, the friction frequency between the impeller 2 and the abradable layer 13 is high.

[0087] When the gap between the abradable layer 13 of the first end portion 121 and the impeller 2 is greater than 0.4 mm, the leakage amount between the impeller 2 and the sealing device 1 is large.

[0088] When the gap between the abradable layer 13 of the first end portion 121 and the impeller 2 is 0.05 mm-0.4 mm, the friction frequency between the impeller 2 and the abradable layer 13 can be reduced, and the leakage amount can be in a reasonable state.

[0089] The heating and ventilation equipment of the present application comprises a magnetic suspension bearing and the compressor 100 of the above embodiment, and the main shaft 3 is in driving connection with the magnetic suspension bearing.

[0090] The heating and ventilation equipment of the present application comprises the compressor 100 of the above embodiment, and by arranging the abradable layer 13 on at least one sealing tooth 12 to reduce the probability of instability of the impeller 2 after contacting with the abradable layer 13, the gap between the sealing device 1 and the impeller 2 can be reduced, the shaft end leakage amount of the main shaft 3 can be reduced, the energy efficiency of the compressor 100 of the present application is high, and the energy efficiency of the heating and ventilation equipment of the present application is high. Moreover, by arranging the abradable layer 13, the impeller 2 can continue to rotate after colliding with the abradable layer 13, the reliability of the compressor of the present application is high, and the energy efficiency of the heating and ventilation equipment of the present application is high.

[0091] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A compressor, wherein, The compressor comprises: a vane wheel; a magnetic suspension bearing; a main shaft, one end of which is in driving connection with the magnetic suspension bearing, and the other end of which is connected with the vane wheel and capable of driving the vane wheel to rotate; a sealing device, the main shaft being rotatably arranged in a main body of the sealing device, the main body being oppositely arranged with the vane wheel in a first direction, a plurality of sealing teeth being arranged on an end surface of the main body facing the vane wheel, an outer surface of at least one of the sealing teeth being provided with an abradable layer configured to be abraded when colliding with the vane wheel, wherein the first direction is consistent with an axial direction of the main shaft.

2. The compressor of claim 1, wherein, The outer surface of each of the sealing teeth is provided with the abradable layer; and / or At least part of the end surface of the main body facing the vane wheel is provided with the abradable layer.

3. The compressor of claim 1, wherein, The area of the abradable layer is less than or equal to the area of the outer surface of the sealing teeth.

4. The compressor of claim 1, wherein, The thermal conductivity of the abradable layer is 0.03 W / mk to 0.5 W / mk.

5. The compressor of claim 1, wherein, The sealing teeth are annular structures, the plurality of sealing teeth are at least three, the plurality of sealing teeth are mutually sleeved and arranged at intervals in a second direction, the second direction being perpendicular to the first direction, wherein the distance between at least one group of adjacent sealing teeth is equal to the distance between any other group of sealing teeth, or the distance between at least one group of adjacent sealing teeth is greater than or less than the distance between at least another group of adjacent sealing teeth.

6. The compressor of claim 1, wherein, The abradable layer is crimped on the sealing teeth; or The abradable layer is adhered to the sealing teeth; or The abradable layer is sprayed or coated on the sealing teeth.

7. The compressor of claim 1, wherein, The abradable layer is a polytetrafluoroethylene layer.

8. The compressor of any one of claims 1 to 7, wherein, The thickness of the abradable layer is in the range of 0.1 mm to 0.5 mm.

9. The compressor of any one of claims 1 to 7, wherein, The sealing teeth have oppositely arranged first and second end portions in the first direction, the second end portion being connected with the main body, and the gap between the abradable layer of the first end portion and the vane wheel is in the range of 0.05 mm to 0.4 mm.

10. A heating and ventilating apparatus wherein, The compressor comprises: The compressor according to any one of claims 1 to 9.

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